Ok, but that's not first amendment concerns. That's shifting in culture tolerance, which is not and should not be subject to legislation.
For example, is it bigoted to opine that you want better border security, and if so, should you get fired for that?
Depends on the argument. If the argument is really about national security (i.e. a group of organized terrorists or a drug cartel crossing the border with impugnity), and that's the argument you make, it's different than the fig leaf that this issue often is, where pundits say things like "THEY are coming to replace US." It's a fundamental misunderstanding of immigration, the promise that makes this country the best one on earth even if it isn't perfect, and it's about oligarchy. The bottom line is if your political ideas don't appeal to the majority of voters, the problem isn't the voters, it's your ideas, in a democracy (and again, that's not me saying we have democracy perfected by any means). And I'm not accusing you of one or the other, but the fact that people see through those pseudo-intellectual fronts more now than in years past is PROGRESS.
Eventually, people will be afraid to talk openly about anything, and they will simply cluster together in like-minded groups and echo chambers, where tribalism, division and de facto segregation will markedly increase— the exact opposite of what these cultural limitations on speech are trying to achieve!
So...racists will be afraid to be racists openly? Yeah, I'm willing to allow that. Sorry, the solution is to quit being a racist if you don't want to be ostracized. People being afraid to talk openly is also not a government issue, that's a cowardice issue. If you believe in your principles, stand up and be proud to announce them, and damn the torpedoes, right?
However, staff at MIT realized that he once opined against affirmative action, so they cancelled his appearance. Politicization of science, anyone?
No one has a constitutional right to speak at MIT. I disagree that it's politicization of science. It's politicization of who speaks at their institution. Politicization of science is, in my view, the correlation between voting trends and adherence to covid science, for example.